Plug and Play Seattle selected 11 startups for the fourth batch of its accelerator program, bringing together a group of founders building everything from space-servicing robotic arms and data-center optical links to opioid-countering antibody therapeutics.
The 12-week program kicks off today and runs through mid-December. Ten of the participating startups are based in Seattle, joined by Tokyo-based wireless power developer Aeterlink, which is participating in an exploratory international track to support its expansion into the U.S. and Pacific Northwest.
Programming will mix virtual sessions with in-person work across Plug and Play Seattle’s regional hubs at the University of Washington’s CoMotion Labs and the SNBL Global Gateway in Everett, Wash. The cohort will present their progress to investors and corporate partners at a Dec. 3 expo at the Boeing Future of Flight in Mukilteo.
“Seattle has the talent and research depth to build companies that shape entire industries,” said Jack Callaghan, director of Plug and Play Seattle, in a statement. “This cohort reflects that potential, from advancing drug discovery to building the infrastructure behind AI.”
Here are the 11 startups in Batch 4:
- Aeterlink (Tokyo): Develops wireless power systems that deliver electricity to devices without physical cables, targeting applications in industrial automation, buildings, and medical devices.
- Athanor AI (Seattle): Builds Kairos, a verification platform using mathematical proofs to validate AI-generated chip-design code.
- Coda AI (Seattle): Creates an AI-native vehicle diagnostics platform combining language models with deterministic computation to help automakers analyze vehicle data across cloud and onboard systems.
- CounterX Therapeutics (Seattle): Develops antibody therapeutics and vaccines designed to blunt the effects of opioids and help prevent accidental overdose in high-risk patients.
- DiffBio (Seattle): Bridges computational protein design with wet-lab testing via gene synthesis, cloning, and automated screening to help researchers evaluate designed protein functions.
- Mindmorphic (Seattle): Builds foundation models for brain signals that function across individuals, reducing the need for person-specific retraining in neurotechnology and brain-computer interfaces.
- Orbital Robotics (Seattle): Builds AI-powered robotic arms for in-space servicing, assembly, and manufacturing using vision-based control to capture objects without specialized docking hardware.
- Q-Immune (Seattle): Analyzes protein interactions in live cells to predict treatment toxicity and guide the creation of safer cell therapies.
- Raydx (Seattle): Develops silicon-photonics interconnects using optical links to replace copper connections, speeding up AI inference in data centers.
- Talus Bio (Seattle): Measures compound effects on hundreds of gene-regulating proteins inside live human cells to accelerate drug discovery for hard-to-drug targets.
- Thoron (Seattle): Manufactures U.S.-made enterprise drones paired with Commander, an AI-powered data-processing software platform.
Silicon Valley-based Plug and Play launched its Seattle presence in March 2025.
In addition to startup accelerators, Plug and Play runs corporate innovation programs and has an in-house venture capital fund that has backed companies such as including Dropbox, Guardant Health, Honey, Lending Club, N26, PayPal, and Rappi.
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